Inverted All-Inorganic Nanorod-Based Light-Emitting Diodes via Electrophoretic Deposition.

High performance and high stability in all-inorganic solution processed nanocrystal-based light-emitting diodes (LEDs) are highly attractive for large area devices compared to organic material-based LEDs. In this work, an inverted all-inorganic LED structure is designed to have an easy integration with thin-film transistors. Adopting robust inorganic materials such as Ni O nanoparticle films as a hole transport layer (HTL) is beneficial for the performance of LED.

The Electron Migration Polarization Boosting Electromagnetic Wave Absorption Based on Ce Atoms Modulated yolk@shell FeN@NGC.

The electron migration polarization is considered as a promising approach to optimize electromagnetic waves (EMW) dissipation. However, it is still difficult to realize well-controlled electron migration and elucidate the related EMW loss mechanisms for current researches. Herein, a novel FeN@NGC/Ce system to construct an effective electron migration model based on the electron leaps among the 4f/5d/6s orbitals of Ce ions is explored.

A Self-Assembly of Single Layer of Co Nanorods to Reveal the Magnetostatic Interaction Mechanism.

In this work, we report a self-assembly method to fabricate a single layer of Co nanorods to study their magnetostatic interaction behavior. The Co nanorods with cambered and flat tips were synthesized by using a solvothermal route and an alcohol-thermal method, respectively. Both of them represent hard magnetic features.

Magnetic Nanoparticles: Synthesis, Anisotropy, and Applications.

Anisotropy is an important and widely present characteristic of materials that provides desired direction-dependent properties. In particular, the introduction of anisotropy into magnetic nanoparticles (MNPs) has become an effective method to obtain new characteristics and functions that are critical for many applications. In this review, we first discuss anisotropy-dependent ferromagnetic properties, ranging from intrinsic magnetocrystalline anisotropy to extrinsic shape and surface anisotropy, and their effects on the magnetic properties.

Atomically Dispersed Cu Catalyst for Efficient Chemoselective Hydrogenation Reaction.

The Cu-based nanocatalysts have shown a high selectivity toward selective hydrogenation reaction, but the underlying catalytic mechanism is still murky. Herein, we report a new gram-scale strategy for realizing the single atom Cu site incorporated into the melem ring of graphitic carbon nitride (Cu/CN) for understanding the catalytic mechanism of a hydrogenation reaction. The as-synthesized Cu/CN exhibits unprecedented selectivity (100%), high activity (TOF = 2.

A New Hexagonal Cobalt Nanosheet Catalyst for Selective CO Conversion to Ethanal.

We report a new form of catalyst based on ferromagnetic hexagonal-close-packed (hcp) Co nanosheets (NSs) for selective CORR to ethanal, CHCHO. In all reduction potentials tested from -0.2 to -1.

Tip Interface Exchange-Coupling Based on "Bi-Anisotropic" Nanocomposites with Low Rare-Earth Content.

Specially designed SmCo/Co magnetic nanocomposites have been fabricated by a "bottom up" process. SmCo nanochips were first prepared by solution-phase chemical synthesis combined with reductive annealing and then coated by chemical deposition of Co nanorods. Both the SmCo nanochips and Co nanorods are anisotropic and could be simultaneously aligned under the external magnetic field.

A unique synthesis of rare-earth-Co-based single crystal particles by "self-aligned" Co nano-arrays.

In this study, anisotropic SmCo magnets were prepared by a distinctive method, which is the high-temperature reductive annealing of Co@SmO with a specially designed nanostructure. High resolution transmission electron microscopy and elemental mapping show that the precursor self-assembly is composed of hcp-structured Co nano-rods with a coherent crystallographic orientation. During high temperature reduction, the SmO shell preserves the original morphology and alignment of these anisotropic Co nano-arrays, providing a template for hcp-structured SmCo single crystal particle synthesis.

Stabilizing Hard Magnetic SmCo Nanoparticles by N-Doped Graphitic Carbon Layer.

We report a chemical method to synthesize size-controllable SmCo nanoparticles (NPs) and to stabilize the NPs against air oxidation by coating a layer of N-doped graphitic carbon (NGC). First 10 nm CoO and 5 nm SmO NPs were synthesized and aggregated in reverse micelles of oleylamine to form SmCo-oxide NPs with a controlled size (110, 150, or 200 nm). The SmCo-O NPs were then coated with polydopamine and thermally annealed to form SmCo-O/NGC NPs, which were further embedded in CaO matrix and reduced with Ca at 850 °C to give SmCo/NGC NPs of 80, 120, or 180 nm, respectively.

Dispersible SmCo nanoparticles with huge coercivity.

It is difficult to obtain dispersed particles of SmCo5 by calciothermic reduction because of sintering during the high-temperature reaction. This study presents a new strategy to synthesize dispersible SmCo5 particles by co-precipitating a precursor containing amorphous Sm(OH)3 and coherent nanoscale Co(OH)2 and Ca(OH)2 crystallites. The Ca(OH)2 dehydrates into CaO which forms an isolation shell around the SmCo5 particles that prevents them sintering during the reaction at 860 °C.

A Flame-Reaction Method for the Large-Scale Synthesis of High-Performance Sm Co Nanomagnets.

We report a flame-reaction method to synthesize high-performance Sm Co (x=1, y=5; x=2, y=17) particles on a multigram scale. This flame reaction allows the controlled decomposition of Sm(NO ) and Co(NO ) to 320 nm SmCo-O (SmCoO + Co O ) particles. A 5.

Chemically synthesized anisotropic SmCo nanomagnets with a large energy product.

In this communication, we report a facile strategy to chemically synthesize anisotropic SmCo nanomagnets with a large magnetic energy product (BH). First, we designed a CoO@SmO-CaO precursor by a one-pot method, which could be further reduced into uniform single-crystal SmCo particles under the stabilization of CaO coating. Following that, CaO was removed under an oxygen-free environment to impede oxidation.

Designing shape anisotropic SmCo particles by chemical synthesis to reveal the morphological evolution mechanism.

In this work, we describe a new protocol to synthesize SmCo single crystal particles with remarkable shape anisotropy (hexagonal and rodlike), which exhibit a giant coercivity of 36.6 kOe and a high M/M value of 0.95 after an alignment.

FePt/Co core/shell nanoparticle-based anisotropic nanocomposites and their exchange spring behavior.

Anisotropic exchange-coupled nanocomposites provide us a salient candidate for the new generation of permanent magnets owing to their huge predicted maximum energy product. However, previous research basically focused on thin films or bulk materials and the impact of easy-axis alignment on the exchange coupling behavior is not clear. Herein, strongly coupled FePt/Co core/shell nanoparticles with single-phase-like hysteresis loops were synthesized by the seed mediated method.